Optical micro-multi-racetrack resonator filter based on SOI waveguide

In this paper, we present a new design of optical Finite Impulse Response (FIR) filter based on combination of multi-racetrack resonators realized with Silicon waveguides. Numerical investigations were carried out on the spectral response of the proposed filters design, in order to obtain FIR band-pass filter around the photonic carrier wavelength of 1.55um. The proposed FIR filter was fabricated using electron beam lithography (EBL). The device was preliminary experimentally examined by a combination of scanning electron microscopy (SEM), atomic force microscopy (AFM) and IR light coupling system. The proposed device can be useful for optical communication systems such as passive optical networks (PON).